package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.MyWebSocketHandler;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.socket.WebSocketHandler;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private MyWebSocketHandler myWebSocketHandler;

    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional(rollbackFor = {Exception.class})
    @Override
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //处理业务异常(地址簿为空,购物车为空)
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        List<ShoppingCart> list = shoppingCartMapper.getByUserId(BaseContext.getCurrentId());
        if (list == null || list.size() == 0) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //向订单表插入1条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setCancelReason(null);
        orders.setCancelTime(null);
        orders.setCheckoutTime(null);
        orders.setConsignee(addressBook.getConsignee());
        orders.setDeliveryTime(null);
        orders.setAddress(addressBook.getDetail());
        orders.setPayStatus(Orders.PAID);
        orders.setPhone(addressBook.getPhone());
        orders.setRejectionReason(null);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setUserId(BaseContext.getCurrentId());
        orders.setUserName(addressBook.getConsignee());

        orderMapper.insert(orders);

        //查询用户购物车中有几项菜品

        List<OrderDetail> orderDetails = new ArrayList<>();

        for (ShoppingCart cart : list) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetails.add(orderDetail);
        }


        //向订单明细表插入n条数据
        orderDetailMapper.insertBatch(orderDetails);

        //清空购物车
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(BaseContext.getCurrentId());
        shoppingCartMapper.deleteById(shoppingCart);

        //封装VO返回
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderAmount(orders.getAmount())
                .orderNumber(orders.getNumber())
                .build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);
        Orders orders = orderMapper.getByNumber(ordersPaymentDTO.getOrderNumber());

//        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code", "ORDERPAID");
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        Integer OrderPaidStatus = Orders.PAID;
        Integer OrderStatus = Orders.TO_BE_CONFIRMED;

        LocalDateTime check_out_time = LocalDateTime.now();

        String orderNumber = ordersPaymentDTO.getOrderNumber();

        orderMapper.updateStatus(orderNumber, OrderPaidStatus, OrderStatus, check_out_time);

        // 通过WebSocket向客户端推送消息
        Map map = new HashMap();
        //与前端约定的json消息 中的三个数据
        map.put("type", 1);// 1 表示来单提醒
        map.put("orderId", orders.getId());
        map.put("content", "来单提醒,订单号: " + ordersPaymentDTO.getOrderNumber());
        //转换为json格式
        String json = JSON.toJSONString(map);
        myWebSocketHandler.sendMessage(json);

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {
        log.info("支付成功，订单号：{}", outTradeNo);

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);


    }

    /**
     * 用户端订单分页查询
     *
     * @param pageNum
     * @param pageSize
     * @param status
     * @return
     */
    public PageResult pageQuery4User(int pageNum, int pageSize, Integer status) {
        // 设置分页
        PageHelper.startPage(pageNum, pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        // 分页条件查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList<>();

        // 查询出订单明细，并封装入OrderVO进行响应
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                Long orderId = orders.getId();// 订单id

                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(), list);
    }

    /**
     * 根据id查询订单详情
     *
     * @param id
     * @return
     */
    @Override
    public OrderVO getById(Long id) {
        //查询订单详情
        Orders orders = orderMapper.getById(id);
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);

        //查询订单明细
        List<OrderDetail> list = orderDetailMapper.getByOrderId(id);
        //封装vo
        orderVO.setOrderDetailList(list);

        return orderVO;
    }

    /**
     * 用户取消订单
     *
     * @param id
     */
    public void userCancelById(Long id) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
//            //调用微信支付退款接口
//            weChatPayUtil.refund(
//                    ordersDB.getNumber(), //商户订单号
//                    ordersDB.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额
//
            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     *
     * @param id
     */
    @Override
    public void repetition(Long id) {
        //获取当前订单
        Orders order = orderMapper.getById(id);
        //获取当前订单的订单明细
        List<OrderDetail> list = orderDetailMapper.getByOrderId(id);
        if (list == null || list.size() == 0) {
            throw new OrderBusinessException("当前订单没有菜品");
        }
        //构造购物车
        List<ShoppingCart> shoppingCartList = new ArrayList<>();
        for (OrderDetail orderDetail : list) {
            ShoppingCart shoppingCart = new ShoppingCart();
            shoppingCart.setName(orderDetail.getName());
            if (orderDetail.getSetmealId() != null) {
                shoppingCart.setSetmealId(orderDetail.getSetmealId());
            } else {
                shoppingCart.setDishId(orderDetail.getDishId());
                shoppingCart.setDishFlavor(orderDetail.getDishFlavor());
            }
            shoppingCart.setUserId(order.getUserId());
            shoppingCart.setNumber(orderDetail.getNumber());
            shoppingCart.setAmount(orderDetail.getAmount());
            shoppingCart.setImage(orderDetail.getImage());
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartList.add(shoppingCart);
        }
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 条件搜索
     *
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> orders = orderMapper.pageQuery(ordersPageQueryDTO);

        return new PageResult(orders.getTotal(), orders.getResult());
    }

    @Override
    public OrderStatisticsVO statistics() {
        Integer toBeConfirmed = orderMapper.countByStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countByStatus(Orders.CONFIRMED);
        Integer deliveryInProgress =  orderMapper.countByStatus(Orders.DELIVERY_IN_PROGRESS);


        OrderStatisticsVO statisticsVO = new OrderStatisticsVO();
        statisticsVO.setConfirmed(confirmed);
        statisticsVO.setDeliveryInProgress(deliveryInProgress);
        statisticsVO.setToBeConfirmed(toBeConfirmed);
        return statisticsVO;
    }

    /**
     * 确认订单,接单
     *
     * @param id
     */
    @Override
    public void confirm(Long id) {
        // 查询订单
        Orders orders = orderMapper.getById(id);

        // 判断订单是否合法
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        if (!orders.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        // 更新订单状态

        Orders newOrders = new Orders();
        newOrders.setId(id);
        newOrders.setStatus(Orders.CONFIRMED);

        //更新数据库
        orderMapper.update(newOrders);
    }

    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        // 获取当前订单
        Orders orders = orderMapper.getById(ordersRejectionDTO.getId());
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        if (!orders.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        if (orders.getPayStatus().equals(Orders.PAID)){
            log.info("订单已支付，申请退款");
        }

        Orders newOrders = new Orders();
        newOrders.setStatus(Orders.CANCELLED);
        newOrders.setId(orders.getId());
        newOrders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        newOrders.setCancelTime(LocalDateTime.now());
        orderMapper.update(newOrders);
    }


    @Override
    public void adminCancel(OrdersCancelDTO ordersCancelDTO) {
        Long id = ordersCancelDTO.getId();
        String cancelReason = ordersCancelDTO.getCancelReason();
        Orders orders = orderMapper.getById(id);
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        if (orders.getStatus().equals(Orders.TO_BE_CONFIRMED) || orders.getStatus().equals(Orders.CANCELLED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        if (orders.getPayStatus().equals(Orders.PAID)){
            log.info("订单已支付，申请退款");
        }

        Orders newOrders = new Orders();
        newOrders.setId(id);
        newOrders.setStatus(Orders.CANCELLED);
        newOrders.setCancelReason(cancelReason);
        newOrders.setCancelTime(LocalDateTime.now());
        orderMapper.update(newOrders);

    }

    @Override
    public void delivery(Long id) {
        Orders orders = orderMapper.getById(id);
        if (orders == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        if (!orders.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders newOrders = new Orders();
        newOrders.setId(id);
        newOrders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        newOrders.setEstimatedDeliveryTime(LocalDateTime.now().plusMinutes(30));
        orderMapper.update(newOrders);

    }

    @Override
    public void complete(Long id) {
        Orders orders = orderMapper.getById(id);
        if (orders == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        if (!orders.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders newOrders = new Orders();
        newOrders.setId(id);
        newOrders.setStatus(Orders.COMPLETED);
        newOrders.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(newOrders);
    }

    /**
     * 订单催单
     *
     * @param id
     */
    @Override
    public void reminder(Long id) {
        Orders orders = orderMapper.getById(id);
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        Map map = new HashMap();
        map.put("type", 2);//1表示来单提醒,2表示订单催单
        map.put("orderId", id);
        map.put("content", "订单号：" + orders.getNumber() + "的订单，有新的来单了，请尽快处理！");
        String jsonString = JSON.toJSONString(map);
        myWebSocketHandler.sendMessage(jsonString);


    }

}
